A hot surface that is dark in colour emits radiation. It is decided to raise the amount of radiation emitted. Three proposals are given: 1 Raise the temperature of the surface. 2 Paint the surface white. 3 Enlarge the surface area. Which proposals are correct?
- A1 only
- B1 and 2 only
- C1 and 3 only
- D1, 2 and 3